Bed system with excretion collecting means

Abstract

 A bed system with an excreting mechanism of the present invention includes a front base (1) for receiving the upper half of a patient and having a first front portion capable of being tilted-up and tilted-down, a rear base (2) for receiving the lower half of the patient and having a second front portion (21) capable of being tilted-up and tilted-down, a pot seat (7) for supporting the buttocks of the patient, a chamber pot (8) for receiving the excretions of the patient, and a posture regulating mechanism for regulating the posture of a patient. In tilting-up of the second front portion (21) of the rear base (2), the pot seat (7) is positioned between the rear end of the front base (1) and the front end of the rear base (2), and the chamber pot (8) is positioned under the pot seat (7). The second portion (21) of the rear base (2) is tilted-up and the tilted-down around the rear edge of the second front portion (21) as a supporting shaft and can be tilted-up and tilted-down around the front edge of the second front portion (21) as a supporting shaft.

Description

BACKGROUND OF THE INVENTION

[0001] The present invention relates to a bed system with an excreting mechanism used for physically handicapped persons difficult in excretion.

[0002] As the bed with the excreting mechanism of this kind, the present inventor has already proposed a technique disclosed in Japanese Patent Laid-open Nos. sho 63-168159 and sho 63-240859. According to the above technique, a base laid on a bed is divided into a front base for receiving the upper half of a patient and a rear base for receiving the lower half. In excretion, the front edge of the front base is tilted-up, and the front end portion of the rear base is ascended for correcting the posture of the patient, to thereby position the buttocks on an opening portion between the front base and the rear base. This makes it possible that the patient excretes with respect to a chamber pot disposed under the opening portion.

[0003] The present inventor has earnestly studied a bed system with an excreting mechanism on the basis of the above technique, and thus found that the above technique has the following technical problem as yet.

[0004] Namely, the patient of this kind obtains the mental stability by the stable posture in excretion, which brings the smooth excretion. The prior art, however, has been lack of thoughtful consideration in terms of this point.

[0005] More specifically, in the prior art, the bed was tilted-up or divided without taking into account the position of the patient lying on the bed at all. As a consequence, the posture of the patient in excretion was unstable case by case, which gave the mental pain to the patient.

[0006] Also, since the buttocks of the patient at the opening portion of the bed was unstable, the patient was often forced to excrete with the unnatural posture.

[0007] Further, the prior art was not enough to consider the posture of the patient returned to the usual bed state after excretion, and had a fear that the buttocks of the patient after excretion was pinched between the divided bases of the bed.

SUMMARY OF THE INVENTION

[0008] An object of the present invention is to provide a bed system with an excreting mechanism capable of stably regulating the posture of a patient.

[0009] Another object of the present invention is to provide a bed system with an excreting mechanism capable of easily inspecting the excretions.

[0010] A further object of the present invention is to automate the operation of the bed system in excretion, and hence to reduce the labor of a patient and a nurse.

[0011] The bed system with an excreting mechanism has a front base for receiving the upper half of a patient and capable of being tilted-up, and a rear base for receiving the lower half of the patient and capable of being tilted-up at its front portion. The rear base is movable forward and backward. A pair of rollers are provided in the vicinities of the front edge and the rear edge of the front base. A bed-sheet is stretched between the rollers so as to be movable forward and backward by rotation of the rollers.

[0012] A posture regulating mechanism is constituted of the above rollers, the bed-sheet, and a roller drive means for driving the rollers.

[0013] A pot seat is provided at an opening portion between the rear edge of the front base and the front edge of the rear base when the front base is tilted-up, and the rear base is moved backward to tilt-up the front portion of the rear base. The pot seat is provided with a cover at both ends thereof. Also, it can be moved integrally with the cover up and down with the tilting-up and tilting-down of the front portion of the rear base. Further, the pot seat and the cover are movable toward both sides. A chamber pot is disposed under the pot seat in such a manner that the upper surface is opened and closed with the tilting-up and tilting-down of the front portion of the rear base.

[0014] By operation of the roller drive means of the above posture regulating mechanism, the rollers are rotated, and the bed-sheet stretched between the rollers is moved forward and backward just as a belt-conveyer. Accordingly, the position of the patient, that is, the posture is regulated. After the regulation of the posture, the front base is tilted-up and the rear base is retreated to tilt-up the front portion of the rear base. Further, by seating the buttocks on the pot seat between the front base and the rear base, the posture in excretion is certainly regulated.

[0015] Further, the bed system of the present invention may be modified as follows:
   Namely, the bed system includes a front base for receiving the upper half of a patient and has a first front portion capable of being tilted-up, and a rear base for receiving the lower half of the patient and has a second front portion capable of being tilted-up. Further, the bed system includes a pot seat for supporting the buttocks of the patient, and a chamber pot for receiving the excretions of the patient.

[0016] The pot seat is positioned between the rear edge of the front base and the front edge of the rear base in tilting-up of the second front portion of the rear base. The chamber pot is disposed under the pot seat. Also, the second front portion of the rear base is tilted-up and tilted-down around the rear end of the second front portion as a supporting shaft and can be tilted-up and tilted-down around the front edge of the second front portion as a supporting shaft.

[0017] At least one of the front base and the rear base is disposed so as to be movable forward and backward. The front base is moved forward or the rear base is moved backward, and the pot seat is provided at the opening portion formed between the rear edge of the front base and the front edge of the rear base when the second front portion of the rear base is tilted-up.

[0018] The front base may be formed so as to be freely tilted downwardly of the horizontal position.

[0019] Also, there is provided a posture regulating mechanism including a pair or plural pairs of rollers provided in the vicinities of both side portions of the front base, a sheet stretched between the rollers so as to be movable rightward and leftward by rotation of the rollers, and a roller drive means for driving the rollers.

[0020] The chamber pot is formed in such a manner that the upper surface is opened and closed with the tilting-up and tilting-down of the second front portion of the rear base.

[0021] Also, there may be disposed a transparent window on the side surface of the chamber pot for freely observing the excretions, and an illuminating device outside or inside the chamber pot for lighting the inside of the chamber pot, and an image pick-up device for picking-up an image of the inside of the chamber pot.

[0022] Further, preferably, the chamber pot is provided with a water supply device for supplying flushing water for flushing the inside of the chamber pot, a drain device for discharging the flushing water or the excretions within the chamber pot, and a jetting device for washing and drying the private parts of the patient.

[0023] The system includes position detecting sensors provided in the vicinity of the front base and the rear base for detecting the position of the patient, a centralized control unit for inputting signals from the position detecting sensors, a front base drive means for moving the front base and tilting-up and tilting-down the first front portion of the front base, and a rear base drive means for tilting-up and tilting-down the second front portion of the rear base. The centralized control unit analyzes the signals from the position detecting sensors, calculates the correction amount, and supplies the correction amount as drive signals to the roller drive means and the front base drive means for regulating the posture of the patient. Also, the centralized control unit outputs the drive signals to the front base drive means and the rear base drive means for moving forward and tilting-up the front base and tilting-up the rear base. Further, the centralized control unit outputs operational signals to the illuminating device and the image pick-up device for picking-up an image of the inside of the chamber pot.

[0024] The front base is advanced or the rear base is retreated, to tilt-up the first front portion of the front base. Also, the second front portion is tilted-up around the rear edge of the second front portion of the rear base as a supporting shaft. Further, by seating the buttocks on the seat positioned between the rear edge of the front base and the front edge of the rear base, the posture in the excretion is certainly regulated. At this time, the chamber pot is disposed under the pot seat, to receive the excretions of the patient.

[0025] Also, by tilting-up the second front portion of the rear base around the front end of the second front portion in non-excretion, it is possible to take an easy posture of ascending the lower half of the patient.

BRIEF DESCRIPTION OF THE DRAWINGS

[0026] 

Fig. 1 is a schematic structural view of a bed system according to a first embodiment of the present invention showing an usual bed state;

Fig. 2 is a view showing the excreting state in the first embodiment;

Fig. 3 is a plan view of the bed system of the first embodiment;

Fig. 4 is a plan view of the bed system of the first embodiment showing the excreting state;

Fig. 5 is a plan view of the bed system of the first embodiment showing the excretion state;

Fig. 6 is a block diagram showing the control system of the first embodiment;

Fig. 7 is a flow chart showing the control procedure in a centralized control unit of the first embodiment;

Fig. 8 is a flow chart showing a continuation of Fig. 7;

Fig. 9 is a schematic structural view of a bed system according to a second embodiment of the present invention showing the usual bed state;

Fig. 10 is a schematic structural view of the bed system according to the second embodiment of the present invention showing the bed state in excretion;

Fig. 11 is a schematic view showing another form in the usual bed state in the second embodiment;

Fig. 12 is a plan view of the bed system of the second embodiment;

Fig. 13 is a plan view of the bed system showing the excretion state in the second embodiment;

Fig. 14 is a view showing the state between supporting shafts and a supporting device at a second front portion of the second embodiment;

Fig. 15 is a block diagram showing the control system of the second embodiment;

Fig. 16 is a flow chart showing the control procedure in the centralized control unit of the second embodiment; and

Fig. 17 is a flow chart showing a continuation of Fig. 16.

DESCRIPTION OF THE PREFERRED EMBODIMENT

[0027] Hereinafter, preferred embodiments of the present invention will be described.

〈Embodiment 1〉

[0028] A first embodiment of the present invention will be described with reference to Figs. 1 to 8.

[0029] Fig. 1 is a schematic view showing the mechanism of a bed system of this embodiment. The upper surface of a bed is constituted of a front base 1 and a rear base 2.

[0030] First, there will be described the peripheral construction of the front base 1 provided with a posture regulating mechanism which is one of the features of this embodiment.

[0031] Two pairs of rollers 3 and 3 are disposed in the vicinities of the front edge and the rear edge of the front base 1, respectively. The rollers 3 and 3 are rotated by a roller drive motor 5 as a roller drive means. A bed-sheet 4 is provided to be stretched between two pairs of rollers 3 and 3. By rotation of the rollers 3 and 3 by means of the above roller drive motor 5, the bed-sheet 4 is moved forward and backward. Since the gravity of the human body lying on the bed is positioned above the buttocks, it is possible to move the patient, that is, regulate the posture by movement of the bed-sheet 4 of the front base 1 on which the upper half of the body lies. Incidentally, the posture regulating mechanism in this embodiment may be used as a patient moving means for inspection or exchange of the bed-sheet, in addition to the excreting means.

[0032] A front base drive actuator 15 (front base drive means) for tilting-up the front base 1 is provided on the lower portion of the front base 1 in the vicinity of the front edge thereof. The front base drive actuator 15 is intended to ascend the front edge of the front base 1 around a supporting shaft 17a as a fulcrum using a cam mechanism or hydro power.

[0033] Next, the peripheral construction of the rear base 2 will be described.

[0034] The rear base 2 is constituted of a front portion 21 and a rear portion 22. The front portion 21 can be tilted-up by a rear base drive actuator 18 (rear base drive means). Also, the rear portion 22 can be moved forward and backward by a rear base moving motor 20 (rear base drive means).

[0035] The front portion 21 and the rear portion 22 of the rear base 2 is connected with each other by means of a supporting shaft 17b. Accordingly, the forward and backward movement of the rear base 2 is made in the state that the front and rear portions 21 and 22 are integrated with each other. The front portion 21 can be ascended up around the supporting shaft 17b by means of the rear base drive actuator 18, independently from the rear portion 22.

[0036] A pot seat 7 having such an opening shape as shown in Fig. 4 is provided on the front edge of the rear base 2 so as to be substantially perpendicular to the rear base 2. A plate-like cover 6 is provided around the above pot seat 7. The cover 6 is intended to keep the privacy of the patient and to prevent the buttocks of the patient from being directly exposed to the outside air.

[0037] In this embodiment, as shown in Fig. 5, the pot seat 7 and the cover 6 are provided so as to be integrally movable toward both sides of the bed. This enables the positional correction at the time when the patient excretes while seating on one side of the bed.

[0038] Also, a stopper 23 capable of being expanded in the direction of the rear base 2 is provided in the vicinity of the rear edge of the front base 1. In excretion, the stopper 23 projects and is engaged with the lower end (front edge in Fig. 2) of the pot seat 7, to thereby prevent the drop of the pot seat 7.

[0039] Also, there is provided a soil preventive cover 19 to be inserted between the buttocks of the patient and the front base 1 in excretion. The soil preventive cover 19 is operated in an interlocking manner with the stopper 23, to certainly introduce the excretions of the patient to a chamber pot 8.

[0040] The chamber pot 8 is disposed under the front portion 21 of the rear base 2. The upper surface of the chamber pot 8 is covered with an openable cover body 24. In using the system as the bed, as shown in Fig. 1, the cover body 24 is pressed by the lower portion of the front portion 21 of the rear base 2, to almost enclose the space inside the chamber pot 8, thereby preventing the odor after excretion from being scattered in the sickroom.

[0041] The cover body 24 has a spring mechanism of a balanced-lever lift type which is rotated around the supporting shaft 17c. It is so constructed that the leading edge thereof is opened upwardly in excretion by being accompanied with the rise of the front portion 21 of the rear base 2 as shown in Fig. 2. In the opened state of the cover body 24, the inner surface thereof is positioned so as to face to the private parts of the patient, and prevents the droplet such as urine or the like from being scattered within the mechanism of the bed.

[0042] A nozzle 25 serving as a dry air blowing-off port and a washing water jetting port is disposed within the chamber pot 8. The nozzle 25 is intended to wash and dry the private parts of the patient after excretion. This washing and drying mechanism is the same that in known public flush toilet, and the explanation thereof is omitted.

[0043] A transparent window 10 through which the inside of the chamber pot 8 can be observed from the outside is provided on a part of the chamber pot 8. A TV camera illuminant 11 (illuminator) and a TV camera 12 (image pick-up tube) are disposed outwardly of the transparent window 10. In addition, the TV camera illuminant 11 may be disposed within the chamber pot 8. As the TV camera 12, an image pick-up tube using CCD is preferable in terms of the space utility. Also, differently from the case that the TV camera 12 is directly disposed in the vicinity of the transparent window 10, the light receiving end of an optical fiber may be provided in the vicinity of the transparent window 10, and the TV camera 12 may be thus disposed in the remote location.

[0044] A flush nozzle 26 is provided on the inner surface of the chamber pot 8. By the pressurized water supplied from the flush nozzle 26, the excretions can be discharged from the chamber pot 8 through a duct 27 provided on the lower portion of the system and a drain pump 28.

[0045] Fig. 3 is a schematic plan view of the bed system of this embodiment. As shown in this figure, position detecting sensors 13 each having an infrared ray sensor, ultrasonic sensor or the like are disposed on both sides of the front base 1. The position of the patient on the front base 1 can be detected by the position detecting sensors 13. In addition, for detecting the position of the patient, there may adopted a technique that a plurality of pressure sensitive sensors are provided on the surfaces of the front base 1 and the rear base 2 for measuring the weight distribution of the patient thereon, to thereby detect the position of the patient.

[0046] An operation panel 30 is provided on one side portion of the bed so as to be operable by a nurse. Also, in order that a patient himself can operate the system, a remote control 31 is prepared. This remote control 31 makes possible the excretion using this system only by operation of an excretion request button 32 and an excretion end button 33.

[0047] Further, for a severely handicapped patient difficult to operate the remote control 31, the system may be operated according to a specified action of the head of the patient which is measured by the position detecting sensors 13. Also, the system may be operated by a method wherein a patient blows a specified number of breathes in a tube communicated to a pneumatic switch sensitive to the pneumatic pressure.

[0048] Next, there will be described a control system of this embodiment. In this embodiment, a centralized control unit 14 on the lower portion of the operation panel 30. The centralized control unit 14 comprises a computer system including a memory storing control parameters and the like, a CPU, a bus for connecting them to each other, an I/O and the like (not shown). As shown in Fig. 6, the centralized control unit 14 has a function of analyzing and arithmetically operating signals supplied from the position detecting sensors 13, the remote control 31 and the operation panel 30 for operating and controlling the actuators, motors and the like.

[0049] Here, there will be described a control procedure for the above centralized control unit 14 with reference to Fig. 7.

[0050] First, when the excretion request button 32 of the remote control 31 is pushed, detection signals are sequentially inputted from the position detecting sensors 13 to the centralized control unit 14 (step 701). The centralized control unit 14 analyzes and arithmetically operates each detection signal and calculates the correction amount for the position of the patient on the bed. The correction amount is converted into a control amount for the roller drive motor 5 (step 702).

[0051] On the basis of the control amount, the centralized control unit 14 outputs a drive signal to the roller drive motor 5, to drive the roller drive motor 5 by a specified amount (step 703). As a consequence, the patient lying upwardly of the suitable position is moved backward together with the bed-sheet 4 by a specified amount. Also, the patient lying downwardly of the suitable position is moved forward together with the bed-sheet 4 by a specified amount. In addition, dependent on the height and the sitting height of the patient, and the request of the patient himself, the suitable position may be changeably set.

[0052] Next, the centralized control unit 14 drives the rear base moving motor 20 to retreat the rear base 2 by a specified amount (step 704), and then drives the rear base drive actuator 18 to ascend (tilt-up) the front portion 21 of the rear base 2 as shown in Fig. 2 (step 705). At this time, in this embodiment, the pot seat 7 is ascended in a manner to be interlocked with the front portion 21 of the rear base 2, and is inserted under the buttocks of a patient. Since the position of the patient is previously corrected by the posture regulating mechanism described above, the buttocks of the patient are accurately positioned with respect to the pot seat 7. Also, at the same time, the soil preventive cover 19 is ascended and is set between the rear edge of the front base 1 and the buttocks of the patient.

[0053] Next, the centralized control unit 14 outputs an operational signal to the front base drive actuator 15, to ascend (tilt-up) the front base 1 as shown in Fig. 2 (step 706). When the excretion is completed in this state and the patient pushes the excretion end button 33 of the remote control 31 (step 707), the TV camera illuminant 11 is lightened (step 708), and the TV camera 12 is operated (step 709) to pick-up an image of the excretions within the chamber pot 8. The image thus picked-up is observed by an external TV monitor or the like (not shown), so that the healthy state of the patient, for example, the digestive power of internal organs can be recognized.

[0054] Also, the TV camera 12 may be replaced by an infrared ray temperature detecting camera for detecting the temperature distribution of the excretions.

[0055] Also, for the detailed inspection, there may be provided an opening/closing door on a part of the window portion or a receiving portion for directly sampling the excretions.

[0056] After completion of the above inspection, by the command of the centralized control unit 14, the private parts of the patient is washed by hot water jetted from the washing nozzle 25, and is then dried by hot air supplied from the air duct 29a (step 711).

[0057] Here, the hot air thus supplied is discharged from the air duct 29b to the outside by an exhauster (not shown). In addition, the air discharged from the air duct 29b may be discharged from an exhaust tube or drain tube to the outside, or may be circulated to the interior through a deodorizing device.

[0058] Further, the pressurized water is released from the flush nozzle 26 to the inside of the chamber pot 8, and also the drain pump 28 is operated to flush the inside of the chamber pot 8 (step 801).

[0059] Next, the front base drive actuator 15 is controlled to return the front base 1 to the original horizontal state (step 802), and the roller drive motor 5 is controlled to move forward the patient (step 803). Namely, the upper half of the patient moved downward (backward) in excretion is returned to the forward position, which makes it possible to prevent the buttocks of the patient from being pinched between the front base 1 and the rear base 2 in advance of the rear base 2.

[0060] Next, the rear base drive actuator 18 is controlled to descend the front portion 21 of the rear base 2 (step 804), and the rear base moving motor 20 is controlled to advance the rear base 2 (step 805), thereby returning the rear base 2 to the original state as shown in Fig. 1.

[0061] In addition, by the descent and the advance of the front portion 21 of the rear base 2, the cover body 24 of the chamber pot 8 is perfectly closed, and consequently the odor after excretion remaining in the chamber pot 8 is prevented from being scattered in the sickroom.

[0062] Also, the flush of the inside of the chamber pot 8 may be made after closing the cover body 24. At this time, prior to the water supply from the flush nozzle 26, the rear surface of the cover body 24 may be certainly washed by the washing water jetted from the washing nozzle 25.

〈Embodiment 2〉

[0063] A second embodiment of the present invention will be described with reference to Figs. 9 to 17.

[0064] In these figures, parts corresponding to those in Embodiment 1 are designated at the same characters, and the explanation is thus omitted.

[0065] Fig. 9 is a schematic view showing the mechanism of a bed system of this embodiment. The upper surface of a bed is constituted of a front base 101 and a rear base 102.

[0066] First, the peripheral construction of the front base 101 will be described.

[0067] The front base 101 is constituted of a first front portion 111 capable of being tilted-up by the front base drive actuator 15 (front base drive means 53), and a first rear portion 112 capable of being moved forward and backward by a front base moving motor 120 (front base drive means 53).

[0068] The first front portion 111 and the first rear portion 112 of the front base 101 are connected with each other by a supporting shaft 41, and are integrally moved forward and backward. Also, the first front portion 111 can be tilted-up around the supporting shaft 41 as a fulcrum by means of a base drive actuator 15 using a cam mechanism, hydro power or the like, independently from the first rear portion 112.

[0069] Rollers 103 (103a, 103b) and rollers 103 (103a, 103b) are disposed on both sides of the first rear portion 112 of the front base 101, respectively. The rollers 103 and 103 are rotated by a roller drive motor 5 as a roller drive means. A sheet 104 is stretched between the rollers 103a and 103b on one side and the rollers 103a and 103b on the other side. By rotation of the rollers 103 and 103 by the roller drive motor 5, the above sheet 104 can be moved rightward and leftward. Namely, by rotation of the rollers 103 and 103, the sheet 104 is operated so as to be fed or rolled in. As shown in Fig. 12, the sheet 104 may be narrow in width to the extent of being spread under the waist of a patient lying on the bed.

[0070] Also, the first front portion 111 of the front base 101 can be tilted downwardly of the horizontal position around the supporting shaft 41 as a fulcrum by means of the front base drive actuator 15. Accordingly, in the case that the body of the patient is shifted on the rear base 102 side, by tilting-down of the first front portion 111, the position of the body can be easily returned on the front base 101 side.

[0071] The reason why the sheet 104 is provided only on the first rear portion 112 in this embodiment is as follows: namely, since the gravity of the human body lying in the bed is positioned slightly above the buttocks, it is possible to move the patient himself, that is, regulate the posture by movement of the sheet 104 of the first rear portion 112 on which the waist portion corresponding to the body gravity lies.

[0072] In addition, the sheet 104 and the drive means therefor may be provided not only on the first rear portion 112 but also on the first front portion 111 or a second front portion 121 described later.

[0073] Next, there will be described the peripheral construction of the rear base 102.

[0074] The rear base 102 is constituted of a second front portion 121 capable of being tilted-up by a rear base drive actuator 118 (rear base drive means), and a second rear portion 122 capable of being separated from a bed main body 100 by tilting-up of the second front portion 121. The second front portion 121 and the second rear portion 122 of the rear base 102 are connected with each other by a supporting shaft 43, and are integrally moved forward and backward. Also, a supporting shaft 42 is provided on the front edge of the second front portion 121.

[0075] The second front portion 121 can be tilted-up and tilted-down around the supporting shaft 43 as a fulcrum by means of the rear base drive actuator 118, independently from the second rear portion 122. Also, the second front portion 121 and the second rear portion 122 can be integrally tilted-up and tilted-down around the supporting shaft 42 as a fulcrum.

[0076] As shown in Fig. 14, a supporting device 70 is provided in the vicinity of the supporting shafts 42 and 43. Internally bent claws 70a and 70b are provided on both ends of the supporting device 70, respectively. By movement of the supporting device 70 forward and backward, the supporting shaft separable from the bed main body 100 can be selected.

[0077] Namely, in the case that the supporting device 70 is positioned on the front side, the supporting shaft 43 is fixed by the claw 70b, so that the front end side of the second front portion 121 is in the state of being freely tilted-up. On the other hand, in the case that the supporting device 70 is positioned on the rear side, the supporting shaft 42 is fixed by the claw 70a, so that the rear end side of the second front portion 121 is in the state of being freely tilted-up. In addition, the supporting device 70 is formed so as to be freely moved forward and backward by a supporting device moving motor 71.

[0078] In the case that the supporting shaft 42 is fixed, when the rear end side of the second front portion 121 is tilted-up as shown in Fig. 11, the second rear portion 122 is ascended in a manner as to be interlocked with the second front portion 121. Here, an actuator for directly supporting the second rear portion 122 may be provided so as to stably perform the tilting-up of the rear base 102 around the supporting shaft 42 as a fulcrum.

[0079] A sheet-like pot seat 107 having such an opening shape as shown in Fig. 13 is provided on the front edge of the rear base 102 so as to be substantially perpendicular to the rear base 102. The pot seat 107 is usually kept to be rolled by a roller 50, and is expanded by being accompanied with the tilting-up of the second front portion 121. In addition, the pot seat 107 is limited to the sheet shape capable of being rolled; but may be formed of a synthetic resin made board having a slight flexibility. In this case, a slit for retractably containing this board may be formed at the portion of the roller 50.

[0080] Also, a stopper 23 capable of being expanded in the direction of the rear base 102 is provided in the vicinity of rear edge of the front base 101. In excretion, the stopper 23 projects and is engaged with the lower end of the pot seat 107 (front edge in Fig. 2), to thereby keep the flexibility of the pot seat 107 within a specified value.

[0081] A chamber pot 8 is provided under the second front portion 121 of the above rear base 102.

[0082] Fig. 12 is a schematic plan view of the bed system according to this embodiment. As shown in this figure, position detecting sensors 13a and 13b are provided on the front end portion and the side end portion of the front base 101, and the rear end portion and the side end portion of the rear base 102, respectively.

[0083] In addition, in this embodiment, a mat is provided on the upper portions of the front base 101 and the rear base 102, and is covered with a bed-sheet; however, the surface of the base itself may serve as the mat.

[0084] As shown in Fig. 15, just as in Embodiment 1, a centralized control unit 14 used in this embodiment has a function of analyzing and arithmetically operating each signal for operating and controlling each actuator, each motor and the like.

[0085] Next, the control procedure of the centralized control unit 14 will be described with reference to Figs. 16 and 17.

[0086] First, when an excretion request button 32 of a remote control 31 is pushed, the detection signals are sequentially inputted from the position detecting sensors 13a and 13b to the centralized control unit 14 (step 1601). The centralized control unit 14 analyzes and arithmetically operates each detection signal and calculates the correction amount for the position of a patient lying on the bed. The correction amount (for right and left position) is converted into the control amount for a roller drive motor 5 (step 1602).

[0087] On the basis of the control amount, the centralized control unit 14 outputs a drive signal with respect to the roller drive motor 5 to drive it by a specified amount (step 1603). As a consequence, the patient positioned in the left side from the suitable position is moved in the right side together with the seat 104. Also, the patient positioned in the right side from the suitable position is moved in the left side by a specified amount together with the sheet 104.

[0088] Next, the centralized control unit 14 judges whether or not the patient must be corrected in his position forward and backward (step 1604). In this step 1604, only in the case that the patient is positioned on the rear side, it is judged that the tilting-down of the front base is required. In the case that the patient is positioned on the front side, in a step 1609 described later, the positional regulation may be made when the first front portion 111 of the front base 101 is tilted-up. Namely, in the case that the patient is positioned on the rear side, the first front portion 111 of the front base 101 is tilted downwardly from the horizontal position, in order that the patient can easily regulate the position (step 1605). Also, in the case that the patient is positioned at the suitable position forward and backward, or positioned only on the front side, the process advances to a step 1607.

[0089] The centralized control unit 14 judges whether or not the positional regulation of the patient is completed (step 1606). In the case that the patient lies in the right or left side from the suitable position, the process returns to step 1602. At step 1606, when the patient is positioned at the suitable position or positioned only on the front side, the process advances to the step 1607.

[0090] The centralized control unit 14 drives the front base moving motor 120 to advance the front base 101 by a specified amount (step 1607). After that, it drives the rear base drive actuator 118 to ascend (tilt-up) the second front portion 121 of the rear base 102 as shown in Fig. 10 (step 1608). At this time, in this embodiment, a pot seat 107 is tilted-up in a manner to be interlocked with the second front portion 121 of the rear base 102, and is inserted under the buttocks of the patient.

[0091] Next, the centralized control unit 14 outputs an operational signal with respect to the front base drive actuator 15 to ascend (tilt-up) the first front portion 111 of the front base 101 as shown in Fig. 10 (step 1609). At this time, since the position of the patient is previously corrected by the posture regulating mechanism as described above, the buttocks are accurately positioned to the pot seat 107. Also, in the case that the patient is positioned on the front side, the upper half of the patient is gradually slipped down by accompanied with the tilting-up of the front base 101, so that the buttocks are accurately positioned on the pot seat 107.

[0092] When the excretion is completed in this state and the patient pushes an excretion end button 33 of a remote control 31 (step 1610), a TV camera illuminant 11 is lightened (step 1611), and a TV camera 12 is operated (step 1612) for picking-up an image of excretions within the chamber pot 8. The image thus picked-up is observed by an external TV monitor or the like (not shown), so that the healthy state of the patient, for example, the digestive power of internal organs can be recognized.

[0093] After completion of the above inspection, by the command of the centralized control unit 14, the private parts of the patient is washed by hot water jetted from a washing nozzle 25, and is then dried by hot air supplied from an air duct 29a (steps 1613 and 1614).

[0094] Further, the pressurized water is released from a flush nozzle 26 to the inside of the chamber pot 8 and also a drain pump 28 is operated, to thereby flush the inside of the chamber pot 8 (step 1715).

[0095] Next, the front drive actuator 15 is controlled to return the front base 101 to the original horizontal state (step 1716). and the rear base drive actuator 118 is controlled to descend the second front portion 121 of the rear base 102 (step 1717). The front base moving motor 120 is controlled to move backward the front base 101, thus returning the bed to the original state as shown in Fig. 9.

[0096] According to this embodiment, the front base is divided into the front portion and the rear portion, and also the rear base is divided into the front portion and the rear portion. Accordingly, in excretion, it is possible to keep the rear portion of the front base to be in the horizontal position, and hence to certainly stabilize the posture of the patient in excretion. Also, since the buttocks are not slipped down in the opening portion of the chamber pot, the patient is prevented from being pinched between the front base and the rear base after excretion.

[0097] According to this embodiment, in positional correction to the rear side, the first front portion 111 of the front base 101 is tilted-down from the horizontal position. However, the second front portion 121 and the second rear portion 122 of the rear base 102 may be tilted-up and ascended around the supporting shaft 42 of the second front portion 121 as a fulcrum, so that the patient can be easily moved forward.

[0098] Also, the front base 101 may be tilted-up and tilted-down around the rear end of the front base 101 as a fulcrum without the tilting-up and tilting-down only of the first front portion 111. In this case, in the state where the front base 101 is tilted-up or tilted-down around the rear end of the rear portion 112 as a fulcrum, the relative angle between the first front portion 111 and the first rear portion 112 are variable around the supporting shaft 41.

[0099] As described above, according to the present invention, it is possible to permit the patient to excrete in the state of certainly regulating the posture of the patient. Also, it is possible to automate the operation in excretion, and hence to reduce the labor of the patient and the nurse.

Claims

1. A bed system with an excreting mechanism comprising:
   a front base for receiving the upper half of a patient, and capable of being tilted-up;
   a rear base for receiving the lower half of the patient, being movable forward and backward, and having a front portion capable of being tilted-up;
   a posture regulating mechanism including a pair or plural pairs of rollers respectively provided in the vicinities of the front edge portion of said front base and the rear edge portion of said front base; a bed-sheet stretched between said rollers and capable of moved forward and backward by rotation of said rollers; and a roller drive means for driving said rollers;
   a pot seat provided at an opening portion between the rear edge of said front base and the front edge of said rear base when said front base is tilted-up and said rear base is moved backward to tilt-up said front portion of said rear base; and
   a chamber pot disposed under said pot seat in such a manner that the upper surface thereof is opened and closed with tilting-up and tilting-down of said front portion of said rear base.

2. A bed system with an excreting mechanism according to claim 1, wherein said pot seat includes a cover at both ends thereof, and which is movable to both sides integrally with said cover.

3. A bed system with an excreting mechanism according to claim 1 or 2, which further comprises a transparent window provided on the surface of said chamber pot for freely observing the excretions; an illuminating device provided outside or inside said transparent window for lighting the inside of said chamber pot; and an image pick-up device for picking-up an image of the inside of said chamber pot.

4. A bed system with an excreting mechanism according to any one of claims 1 to 3, which further comprises:
   position detecting sensors provided in the vicinity of the peripheral edge of said front base for detecting the position of a patient;
   a centralized control unit for receiving signals from said position detecting sensors;
   a front base drive means for tilting-up and tilting-down said front base; and
   a rear base drive means for moving said rear base, and for tilting-up and tilting-down said front portion of said rear base;
   wherein said centralized control unit analyzes signals from said position detecting sensors, calculates the movement amount of said bed-sheet, and supplies said correction amount to said roller drive means as a drive signal for regulating the posture of the patient; and outputs drive signals to said front base drive means and said rear base drive means for tilting-up said front base, and for moving backward and tilting-up said rear base.

5. A bed system with an excreting mechanism according to any one of claims 1 to 4, which further comprises a posture regulating mechanism including a pair or plural pairs of rollers respectively provided in the vicinities of both side portions of said front base; a sheet stretched between said rollers so as to be movable rightward and leftward by rotation of said rollers; and a roller drive means for driving said rollers.

6. A bed system with an excreting mechanism according to any one of claims 1 to 5, wherein said roller drive means can be operated by operation of a manual switch.

7. A bed system with an excreting mechanism according to claim 5 or 6, which further comprises:
   position detecting sensors provided in the vicinity of the peripheral edge of said front base for detecting the position of the patient;
   a centralized control unit for receiving signals from said position detecting sensors;
   a front base drive means for tilting-up and tilting-down said front base; and
   a rear base drive means for moving said rear base and for tilting-up and tilting-down a front portion of said rear base;
   wherein said centralized control unit analyzes signals from said position detecting sensors, calculates the movement amount for said bed-sheet and said sheet, and supplies said correction amount to said roller drive means as drive signals for regulating the posture of the patient; and outputs drive signals to said front base drive means and said rear base drive means for tilting-up said front base, and for moving backward and tilting-up said rear base.

8. A bed system with an excreting mechanism according to any one of claims 3 to 7, which further comprises:
   position detecting sensors provided in the vicinity of the peripheral edge of said front base for detecting the position of the patient;
   a centralized control unit for receiving signals from said position detecting sensors;
   a front base drive means for tilting-up and tilting-down said front base; and
   a rear base drive means for moving said rear base and for tilting-up and tilting-down said front portion of said rear base;
   wherein said centralized control unit analyzes signals from said position detecting sensors, calculates the movement amount for said bed-sheet, and supplies said correction amount to said roller drive means as a drive signal for regulating the posture of the patient; outputs drive signals to said front base drive means and said rear base drive means for tilting-up said front base, and for moving backward and tilting-up said rear base; and outputs operational signals to said illuminating device and said image pick-up device for picking-up an image of the inside of said chamber pot.

9. A bed system with an excreting mechanism comprising:
   a front base for receiving the upper half of a patient and having a first front portion capable of being tilted-up;
   a rear base for receiving the lower half of the patient and having a second front portion capable of being tilted-up;
   a pot seat for supporting the buttocks of the patient; and
   a chamber pot for receiving the excretions of the patient;
   wherein said pot seat is positioned between the rear edge of said front base and the front edge of said rear base, and said chamber pot is positioned under said pot seat, when said second front portion of said rear base is tilted-up.

10. A bed system with an excreting mechanism comprising:
   a front base for receiving the upper half of a patient, and having a first front portion capable of being tilted-up and a first rear portion for keeping the horizontal state;
   a rear base for receiving the lower half of the patient, and having a second front portion capable of being tilted-up;
   a pot seat for supporting the buttocks of the patient; and
   a chamber pot for receiving the excretions of the patient;
   wherein said pot seat is positioned between the rear edge of said front base and the front edge of said rear base, and said chamber pot is positioned under said pot seat, when said second front portion of said rear base is tilted-up.

11. A bed system with an excreting mechanism according to claim 9 or 10, wherein said second front portion of said rear base is tilted-up and tilted-down around the rear end of said second front portion as a supporting shaft and can be tilted-up and tilted-down around the front end of said second front portion as a supporting shaft.

12. A bed system with an excreting mechanism according to any one of claims 9 to 11,
   wherein at least one of said front base and said rear base is movable forward and backward; and
   said pot seat is provided on an opening portion formed between the rear edge of said front base and the front edge of said rear base, when said front base is moved forward or the rear base is moved backward to tilt-up said second front portion of said rear base.

13. A bed system with an excreting mechanism according to any one of claims 9 to 12, wherein said front base can be tilted downwardly of the horizontal position around the rear edge of said front base or the rear edge of said first front por tion as a fulcrum.

14. A bed system with an excreting mechanism according to any one of claims 9 to 13, which further comprises a posture regulating mechanism including a pair or plural pairs of rollers provided in the vicinities of both side portions of said front base, a sheet stretched between said rollers so as to be movable rightward and leftward by rotation of said rollers; and a roller drive means for driving said rollers.

15. A bed system with an excreting mechanism according to any one of claims 9 to 14, wherein said chamber pot is provided in such a manner that the upper surface thereof is opened and closed when said second front portion of said rear base is tilted-up and tilted-down.

16. A bed system with an excreting mechanism according to any one of claims 9 to 15, which further comprises a transparent window provided on the side surface of said chamber pot for freely observing the excretions of the patient; an illuminating device provided outside or inside said chamber pot for lighting the inside of said chamber pot; and an image pick-up device for picking-up an image of the inside of said chamber pot.

17. A bed system with an excreting mechanism according to any one of claims 9 to 16, wherein said chamber pot is provided with a water supply device for supplying flush water to flush the inside of said chamber pot, a drain device for discharging flush water within said chamber pot or the excretions, and a jetting device for washing and drying the private parts of the patient.

18. A bed system with an excreting mechanism according to any one of claims 14 to 17, which further comprises:
   position detecting sensors provided in the vicinities of said front base and said rear base for detecting the position of a patient;
   a centralized control unit for receiving signals from said detecting sensors;
   a front base drive means for moving said front base and for tilting-up and tilting-down said first front portion of said front base;
   a rear base drive means for tilting-up and tilting-down said second front portion of said rear base;
   wherein said centralized control unit analyzes signals from said position detecting sensors, calculates the correction amount for said sheet, and supplies said correction amount to said roller drive means and said front base drive means as drive signals for regulating the posture of the patient; outputs drive signals to said front base drive means and said rear base drive means for moving forward and tilting-up said front base and for tilting-up said rear base.

19. A bed system with an excreting mechanism according to any one of claims 14 to 18, which further comprises:
   a transparent window provided on the side surface of said chamber pot for freely observing the excretions;
   an illuminating device provided outside or inside said transparent window for lighting the inside of said chamber pot;
   an image pick-up device for picking-up an image of the inside of said chamber pot;
   position detecting sensors respectively provided in the vicinities of said front base and said rear base for detecting the position of the patient;
   a centralized control unit for receiving signals from said position detecting sensors;
   a front base drive means for moving forward and backward said front base and for tilting-up and tilting-down said first front portion of said front base; and
   a rear base drive means for tilting-up and tilting-down said second front portion of said rear base;
   wherein said centralized control unit analyzes signals from said position sensors, calculates the correction amount, and supplies said correction amount to said roller drive means and said front base drive means as drive signals for regulating the posture of the patient; outputs drive signals to said front base drive means and said front base drive means for moving forward and tilting-up said front base and for tilting-up said rear base; and outputs operational signals to said illuminating device and said image pick-up device for picking-up an image of the inside of said chamber pot.

20. A bed system with an excreting mechanism according to any one of claims 9 to 19, which further comprises a posture regulating mechanism including a pair or plural pairs of rollers respectively provided in the vicinities of said front edge portion of said front base and the rear edge portion of said front base; a bed-sheet stretched between said rollers so as to be movable forward and backward by rotation of said rollers; and a roller drive means for driving said rollers.

21. A bed system with an excreting mechanism according to to claim 20, which further comprises:
   position detecting sensors respectively provided in the vicinities of said front base and said rear base for detecting the position of the patient;
   a centralized control unit for receiving signals from said position detecting sensors;
   a front base drive means for moving said front base and for tilting-up and tilting-down said first front portion of said front base; and
   a rear base drive means for tilting-up and tilting-down said second front portion of said rear base;
   wherein said centralized control unit analyzes signals from said position sensors, calculates the correction amount for said bed-sheet, and supplies said correction amount to said roller drive means and said front base drive means as drive signals for regulating the posture of the patient; and outputs drive signals to said front base drive means and said rear base drive means for moving forward and tilting-up said front base and for tilting-up said rear base.

22. A bed system with an excreting mechanism according to any one of claims 9 to 21, wherein said roller drive means can be operated by operation of a manual switch.

23. A bed system with an excreting mechanism according to any one of claims 9 to 22, which further comprises:
   a front base drive means for moving said front base and for tilting-up and tilting-down said first front portion of said front base;
   a rear base drive means for tilting-up and tilting-down said second front portion;
   a centralized control unit for outputs drive signals to said front base drive means and said rear base drive means;
   wherein said centralized control unit outputs drive signals to said front base drive means and said rear base drive means for returning said front base and rear base to the original horizontal state, when said centralized control unit inputs excretion end signal.

Drawing